CN105136265B - A kind of accurate metering method of weighing and burden - Google Patents
A kind of accurate metering method of weighing and burden Download PDFInfo
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- CN105136265B CN105136265B CN201510518104.6A CN201510518104A CN105136265B CN 105136265 B CN105136265 B CN 105136265B CN 201510518104 A CN201510518104 A CN 201510518104A CN 105136265 B CN105136265 B CN 105136265B
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Abstract
The accurate metering method of the weighing and burden of the present invention, dispensing is carried out according to the principle of variable=set point speed drop value, when the scale value for detecting weigher reaches the difference of setting value and velocity head value, then that closes material bin matches somebody with somebody bin gate, realizes accurate dispensing；Velocity head value passes through formula（1）Ask for：Velocity head value=dispensing speed × time equivalent（1）.In the case of small definite value, interrupted blanking, the method approached using tabling look-up carries out dispensing, including：A) sets up dispensing tables of data；B) computation of table lookup dispensing opening time；C) enablings dispensing；D) calculates blanking precision.The present invention uses velocity head control principle, and dispensing speed changes at random, and time equivalent is metastable, and it is determined by dispensing equipment self attributes, realizes the accurate anticipation to drop value, realizes accurate dispensing.Verified by the practical application of a large amount of high ferro concrete construction sites, lifting proportioning accuracy effect is significantly, easy to utilize.
Description
Technical field
The present invention relates to a kind of accurate metering method of weighing and burden, in particular, more particularly to a kind of foundation is with working as
The accurate metering method of the weighing and burden of the velocity head value of preceding dispensing velocity correlation.
Background technology
Current weighing and burden instrument continues to use the dispensing principle for the i.e. drop of weight of closing the door in advance always, and the random change of drop is made
Into the appearance of Aggregate Feeding Error.Although existing dispensing equipment takes drop correction measure, this amendment is to use to work as
The weight drop and old weight drop of disk actual measurement carry out calculating the dispensing drop to form next disk in certain proportion, this to repair
Obvious hysteresis quality is just carried, it is like water off a duck's back to this current disk, there is error-logic of fastening one person's story upon another person again as next disk drop.
Therefore to ensure single-deck proportioning accuracy, then continue to use traditional drop principle and there are theoretical mistaken ideas.
Furthermore, for small definite value dispensing and the operating mode of interrupted blanking, traditional proportioning instrument is typically using the set time (when opening
Between, close the time can be set) shake batching mode carry out dispensing, if under the method shaky time set it is bigger than normal, proportioning accuracy without
Method ensures that shake number of times is more if shaky time setting is less than normal, reduces production efficiency, damages batching machine.In summary, pass
Material instrument under unified central planning is problematic in that in terms of drop correction measure and Alloying Ingredient Model, it is difficult to realize high-precision dispensing, it is impossible to suitable
Answer the high-precision dispensing occasion such as high ferro concrete production.
The content of the invention
There is provided a kind of accurate metering method of weighing and burden in order to overcome above-mentioned technical problem by the present invention.
The accurate metering method of the weighing and burden of the present invention, it is characterised in that in the case of common dispensing, according to metering
The principle of value=setting value-velocity head value carries out dispensing, when the scale value for detecting weigher reaches setting value and velocity head
During the difference of value, then that closes material bin matches somebody with somebody bin gate, you can realize accurate dispensing；The setting value is the material weight to be obtained
Amount, variable is the weight of material measured by weigher, and velocity head value is the product of " dispensing speed " and " time equivalent ",
Dispensing speed is to fall on the weight of material on weigher in the unit time；Velocity head value is asked for by formula (1)：
Velocity head value=dispensing speed × time equivalent (1)
Wherein, time equivalent is the metastable self attributes of a dispensing equipment.
The accurate metering method of the weighing and burden of the present invention, the acquisition methods of the time equivalent of material bin are：Pass through scene
Actual measurement dispensing speed and actual dispensing drop value, and after intelligence computation, amendment acquisition equipment time equivalent.
The accurate metering method of the weighing and burden of the present invention, the specific acquisition methods of time equivalent are：After dispensing is finished, if
Close the door the moment dispensing speed be V ', by the use of actual dispensing value subtract the moment of closing the door variable be used as drop value Z, substitute into formula
(2) the time equivalent Tn that this measurement is obtained is calculated；And result of calculation is substituted into formula (3) to time equivalent T progress
Amendment；
Tn=Z/V ' (2)
T=To (1- α)+Tn* α (3)
Wherein, α is the amendment proportionality coefficient less than 1, and To is the time equivalent before this measurement；Calculating the time first ought
Directly obtained by formula (2) during amount.
The accurate metering method of the weighing and burden of the present invention, in the case of small definite value, interrupted blanking, using closing in advance
With bin gate, the method then approached using tabling look-up carries out crawl dispensing, and approach method of tabling look-up is realized by following steps：a).
Dispensing tables of data is set up, the actual dispensing data of material bin are sampled, discontinuous distribution is taken, gathers out to open and matches somebody with somebody
The bin gate period be respectively t1, t2 ..., in the case of tn, the actual weight of material actually dropped on weigher, if it is respectively
M1, m2 ..., mn, it is established that opening time section and dispensing data dispensing curve, t1 ＜ t2 ＜ ... ＜ tn；Each the period is
Individually open with bin gate metering；B) computation of table lookup dispensing opening time：If current variable m smaller than setting value, if β is less than 1
One proportionality coefficient, meaning is to owe feed supplement coefficient, and by target batch value of m* β, dispensing curve acquired from step a), is asked
Go out corresponding interruption opening time, be set to t；C) enablings dispensing, the opening time section of control material storehouse feed opening is matched somebody with somebody for t
Material, the actual weight of material after establishing material is finished is m '；Perform step d)；D) calculates blanking precision, by actual weight of material
M ' is compared with setting value, and calculates proportioning accuracy whether within the accuracy rating of setting, if dispensing is complete
Into；If it was not then calculating the difference of setting value and current blanking weight m ', step b) is performed.
In the accurate metering method of the weighing and burden of the present invention, step d), if it is just overproof or negative super to frequently occur feed supplement
Poor situation, then illustrate that the dispensing curve set up in step a) has no longer adapted to the dispensing operating mode of current material bin, be considered as amendment
Or re-establish dispensing tables of data.
The beneficial effects of the invention are as follows：As it was previously stated, traditional weight drop control principle is because drop value is gathered and is repaiied
Positive hysteresis quality, it is difficult to ensure the proportioning accuracy when shroud, or even be difficult to ensure that the proportioning accuracy of latter disk.The present invention is using speed
Spend drop control principle：Velocity head value=dispensing speed × time equivalent, dispensing speed changes at random, and time equivalent
It is metastable, it is determined by dispensing equipment self attributes.The present invention is realized to falling by gathering dispensing speed in real time
The accurate anticipation of difference, it is achieved thereby that precisely dispensing.Verified, carried by the practical application of a large amount of high ferro concrete construction sites
Rise proportioning accuracy effect significantly, and it is easy to utilize.
For the extremely unstable occasion of the dispensing speed such as small definite value, interrupted blanking, dispensing tables of data has been initially set up, has been used
The method approached of tabling look-up carries out dispensing, can obtain preferable proportioning accuracy.
Brief description of the drawings
Fig. 1 is application scenario schematic diagram of the present invention.
Embodiment
The invention will be further described with example below in conjunction with the accompanying drawings.
As shown in figure 1, giving the application scenario schematic diagram of the present invention, dispensing drop is made up of following three part：
(1) material drop section area in door closing procedure；
(2) close the door moment material space extendible portion；
(3) moment material impact amount of closing the door part；
This three part is all proportional with proportioning materials speed, therefore drop value is directly proportional pass to dispensing speed
System, so we have proposed：The formula of velocity head value=dispensing speed × time equivalent.Dispensing speed changes at random,
And time equivalent is metastable.The formula theory deduction is correct, and has passed through a large amount of practical application checkings.
In the case of common dispensing, dispensing is carried out according to the principle of variable=setting value-velocity head value, works as detection
When reaching the difference of setting value and velocity head value to the scale value of weigher, then that closes material bin matches somebody with somebody bin gate, you can realize accurate
Dispensing；The setting value is the weight of material to be obtained, and variable is the weight of material measured by weigher, velocity head
It is worth the product for " dispensing speed " and " time equivalent ", dispensing speed is to fall on the weight of material on weigher in the unit time；
Velocity head value is asked for by formula (1)：
Velocity head value=dispensing speed × time equivalent (1)
The accurate metering method of the weighing and burden of the present invention, the specific acquisition methods of time equivalent are：After dispensing is finished, if
Close the door the moment dispensing speed be V ', actual dispensing value subtract the moment of closing the door variable be drop value Z, substitute into formula (2) it is right
The time equivalent Tn that this measurement is obtained is calculated；And be modified result of calculation substitution formula (3) to time equivalent T；
Tn=Z/V ' (2)
T=To (1- α)+Tn* α (3)
Wherein, α is the amendment proportionality coefficient less than 1, and To is the time equivalent before this measurement；Calculating the time first ought
Directly obtained by formula (2) during amount.
In the dispensing occasion of small definite value (referring generally within the drop value that setting value is 3 times), and because material blanking has some setbacks
Interrupted blanking situation, due to being difficult to obtain correct dispensing speed, therefore should not use above-mentioned velocity head dispensing caused by smooth
Principle, should carry out dispensing using following approximation theory of tabling look-up.
Approach method of tabling look-up is realized by following steps：
A) sets up dispensing tables of data, and the actual dispensing data of material bin are sampled, discontinuous dispensing side is taken
Method, gather out open with the bin gate period be respectively t1, t2 ..., when tn, the actual material actually dropped on weigher
Weight, if its be respectively m1, m2 ..., mn, it is established that opening time section and dispensing data dispensing curve；T1 ＜ t2 ＜ ... ＜
tn；Each period measures individually to open with bin gate；
B) computation of table lookup dispensing opening time：If current variable m smaller than setting value, if β is a ratio less than 1
Coefficient, meaning is to owe feed supplement coefficient, and by target batch value of m* β, dispensing curve acquired from step a), is obtained corresponding
It is interrupted opening time, is set to t；
C) enablings dispensing, control material storehouse feed opening opening time section for t carry out dispensing, establishing material finish after reality
Border weight of material is m '；Perform step d)；
D) calculates blanking precision, and actual weight of material m ' is compared with setting value, and calculates proportioning accuracy is
It is no within the accuracy rating of setting, if completed in, dispensing；If it was not then calculating setting value and current blanking weight
M ' difference is measured, step b) is performed.
In the accurate metering method of the weighing and burden of the present invention, step d), if it is just overproof or negative super to frequently occur feed supplement
Poor situation, then illustrate that the dispensing curve set up in step a) has no longer adapted to the dispensing operating mode of current material bin, be considered as amendment
Or re-establish dispensing tables of data.
Claims (4)
1. the accurate metering method of a kind of weighing and burden, it is characterised in that in the case of common dispensing, according to variable=set
The principle of definite value-velocity head value carries out dispensing, when the scale value for detecting weigher reaches the difference of setting value and velocity head value
When, then that closes material bin matches somebody with somebody bin gate, you can realize accurate dispensing；The setting value is the weight of material to be obtained, metering
It is worth the weight of material to be measured by weigher, velocity head value is " dispensing speed " and the product of " time equivalent ", dispensing speed
Spend the weight of material to be fallen in the unit time on weigher；Velocity head value is asked for by formula (1)：
Velocity head value=dispensing speed × time equivalent (1)
Wherein, time equivalent is the metastable self attributes of a dispensing equipment；
In the case of small definite value, interrupted blanking, match somebody with somebody bin gate using closing in advance, the method then approached using tabling look-up carries out point
Dynamic dispensing, approach method of tabling look-up is realized by following steps：
A) sets up dispensing tables of data, and the actual dispensing data of material bin are sampled, discontinuous distribution is taken, adopts
Collect out with the bin gate period be respectively t1, t2 ..., in the case of tn, the actual weight of material actually dropped on weigher, if
It is respectively m1, m2 ..., mn, it is established that opening time section and dispensing data dispensing curve；T1 ＜ t2 ＜ ... ＜ tn；Each
Period measures individually to open with bin gate；
B) computation of table lookup dispensing opening time：If current variable m smaller than setting value, if β is a proportionality coefficient less than 1,
Meaning is to owe feed supplement coefficient, and by target batch value of m* β, dispensing curve acquired from step a), is obtained corresponding separated
The door time, it is set to t；
C) enablings dispensing, control material storehouse feed opening opening time section for t carry out dispensing, establishing material finish after actual thing
Material weight is m '；Perform step d)；
D) calculates blanking precision, and actual weight of material m ' is compared with setting value, and calculate proportioning accuracy whether
Within the accuracy rating of setting, if in dispensing completion；If it was not then calculating setting value and current blanking weight m '
Difference, perform step b).
2. the accurate metering method of weighing and burden according to claim 1, it is characterised in that the time equivalent of material bin
Acquisition methods are：Measure dispensing speed and actual dispensing drop value by live actual, and through intelligence computation, correct after obtain and set
Standby time equivalent.
3. the accurate metering method of weighing and burden according to claim 2, it is characterised in that the specific acquisition of time equivalent
Method is：After dispensing is finished, if the dispensing speed at moment of closing the door is V ', the variable at moment of closing the door is subtracted using actual dispensing value
As the corresponding drop value Z of dispensing speed V ', substitute into formula (2) and the time equivalent Tn of this measurement acquisition is calculated；
And be modified result of calculation substitution formula (3) to time equivalent T；
Tn=Z/V ' (2)
T=To (1- α)+Tn* α (3)
Wherein, α is the amendment proportionality coefficient less than 1, and To is the time equivalent before this measurement；When calculating time equivalent first
Directly obtained by formula (2).
4. the accurate metering method of weighing and burden according to claim 1, it is characterised in that：In step d), if frequently
Occur that feed supplement is just overproof or negative overproof situation, then illustrate that the dispensing curve set up in step a) no longer adapts to current material bin
Dispensing operating mode, is considered as correcting or re-establishes dispensing tables of data.
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| CN106325312B (en) * | 2016-06-08 | 2019-03-08 | 武汉科技大学 | A kind of Automatic Burden Control method and system of multistage blanking and dynamic corrections monitoring |
| CN106292508B (en) * | 2016-08-22 | 2019-02-01 | 共享智能装备有限公司 | Using the method for magnechuck ingredient |
| CN107478308A (en) * | 2017-07-30 | 2017-12-15 | 合肥徽工工业自动化工程有限公司 | A kind of multistage blanking and the Automatic Burden Control method of dynamic corrections |
| CN107560701B (en) * | 2017-08-22 | 2019-07-19 | 中联重科股份有限公司 | A kind of batching metering method and equipment |
| CN108955850B (en) * | 2018-07-06 | 2019-08-27 | 川田机械制造(上海)有限公司 | The automatic method for obtaining metering preset value for dosing machine |
| CN110585984A (en) * | 2019-09-29 | 2019-12-20 | 无锡大拇指机电科技有限公司 | Batching control method and system |
| CN111606065B (en) * | 2020-05-23 | 2021-08-20 | 虔东稀土集团股份有限公司 | Powder feeding method and device |
| CN112844216A (en) * | 2020-12-03 | 2021-05-28 | 广东精威智能机器有限公司 | Material supplementing method for multi-scale weighing mixing and mixing equipment |
| CN112695589A (en) * | 2020-12-28 | 2021-04-23 | 无锡市万方电子有限公司 | Intelligent fuzzy network algorithm of asphalt mixing station weighing control system |
| CN113843898B (en) * | 2021-09-22 | 2023-06-02 | 三一汽车制造有限公司 | Batching control method, batching device and mixing station |
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| CN100371840C (en) * | 2004-06-09 | 2008-02-27 | 青岛高校软控股份有限公司 | On-line weighing dispensing method based on feed speed control |
| CN102175294B (en) * | 2011-01-20 | 2013-06-12 | 三一重工股份有限公司 | Material metering control method and material metering control device |
| CN102445261A (en) * | 2011-09-29 | 2012-05-09 | 河南中烟工业有限责任公司 | Virtual metering method for accurate material cabinet feeding |
| CN103358401B (en) * | 2012-11-20 | 2015-11-18 | 北汽福田汽车股份有限公司 | Double speed measurement control method and device |
| CN103968924A (en) * | 2014-05-28 | 2014-08-06 | 重庆大学 | Multistage-control-based batching weighing control method |
| CN104260207B (en) * | 2014-09-19 | 2017-12-29 | 中国铁道科学研究院铁道建筑研究所 | A kind of concrete mixing plant proportioning accuracy kinetic-control system and its method |
| CN104552610B (en) * | 2014-12-26 | 2017-04-05 | 三一汽车制造有限公司 | The ingredient control method and system of concrete mixing plant |
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